CN104190893B - A kind of arrangements for speed regulation for automation continuous casting system and speed regulating method - Google Patents
A kind of arrangements for speed regulation for automation continuous casting system and speed regulating method Download PDFInfo
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Abstract
The invention belongs to continuous casting technical field, particularly relate to a kind of arrangements for speed regulation for automation continuous casting system and speed regulating method.This device comprises moving cell, detects feedback unit and calculation control unit; Wherein moving cell comprises: caster bracket 3, hydraulic system; Detect feedback unit to comprise: pulse output type draw wire encoder 4, voltage output type draw wire encoder 5, amplifier 13, PLC Analog input mModule 17, potentiometer 18; Calculation control unit comprises: PC 14, PLCCPU15, PLC analog output module 16.This device has simple to operate, saves artificial, security of operation, stablizes, is easy to control, and the advantages such as process is accurate, are applied aborning.
Description
Technical field
The invention belongs to continuous casting technical field, particularly relate to a kind of arrangements for speed regulation for automation continuous casting system and speed regulating method.
Background technology
Semisolid continuous casting is the product that semi-solid processing combines with modern continuous casting technology.In semisolid continuous casting process, metal bath enters crystallizer with the state of solid-liquid two-phase coexistent, and solid phase is wherein n on-dendritic grain structure.The technical process of semisolid continuous casting is the preparation → throwing of metal smelt → semi solid slurry.Its key problem in technology mainly contains two, and one is formation and the control of the granular solid phase of n on-dendritic under continuous coo1ing stirring condition, two be semi solid slurry containing the granular solid phase of n on-dendritic fill type.In whole process, want to prepare high-quality semi-solid blank, be unable to do without the technique of high-quality, the accurate continuous casting installation for casting of more too busy to get away control.
Existing conticaster has two classes: horizontal caster and vertical continuous casting machine.Because horizontal caster is in all drawbacks of semisolid continuous casting technical field, current semisolid continuous casting machine is based on rectilinear.Traditional vertical continuous casting machine, what especially small-sized conticaster adopted substantially is all manual operation, the precision holding its procedure parameter is difficult in the process of continuous casting, especially the factor such as most important melt temperature, casting speed and cooling water intensity in casting process, even if on the conticaster with automatic control system, also only have display set-point on the control panel, instead of speed actual value accurately, expect actual velocity amplitude, arrangements for speed regulation just seem particularly important.
The haulage gear of current vertical continuous casting machine mainly adopts wire rope pulley trailer system and these two kinds of forms of hydraulic cylinder jacking system, but adopt the drawback of rope traction system to be the balance of bracket in motion process being difficult to grasp traction, in the process of dummy ingot centering, compare hydraulic system also more difficult.
Summary of the invention
In order to realize the accurate control to hydraulic system draw-casting machine casting speed, the present invention proposes a kind of arrangements for speed regulation for automation continuous casting system, comprising moving cell, detecting feedback unit and calculation control unit; Wherein moving cell comprises: caster bracket 3, hydraulic system; Detect feedback unit to comprise: pulse output type draw wire encoder 4, voltage output type draw wire encoder 5, amplifier 13, PLC Analog input mModule 17, potentiometer 18; Calculation control unit comprises: PC 14, PLCCPU15, PLC analog output module 16.
The hydraulic system of described moving cell comprises hydraulic jack 6, electrohydraulic proportional velocity regulating valve 7, check valve 8, hydraulic lock 9, solenoid directional control valve 10, overflow valve 11, Pressure gauge 12, liquid level liquid thermometer; Three-position four-way electromagnetic directional valve 3WE6A-61B/CG24NZ5L selected by solenoid directional control valve 10, and electrohydraulic proportional velocity regulating valve 7 adopts 2FRE6B-20B/16QM, and check valve 8 adopts S10A1/2, and Pressure gauge 12 adopts YN60,0-40Mpa, and liquid level liquid thermometer adopts YWZ200T; Bracket is realized at the speeds control risen and in decline process by the hydraulic system of the meter out speed governing of design, electrohydraulic proportional velocity regulating valve 7 adopts 2FRE6B-20B/16QM to make to rise to the movement velocity that can control caster bracket in the process of certain position dummy ingot centering at caster bracket simultaneously, and minimum speed can reach 0.8mm/s.
Described amplifier 13 adopts VT-5010S30 feedback circuit; PLCCPU15 and PLC Analog input mModule 17 adopts CPU314C-2DP module in Siemens S7300 and SM331 Analog input mModule respectively; Pulse output type draw wire encoder 4 adopts KS90 pulse output type draw wire encoder, is used for detecting movement of bracket speed, and the number according to exporting pulse obtains velocity amplitude and move distance value by conversion; Voltage output type draw wire encoder 5 is used for detecting bracket locations, is dummy ingot centering and the service of casting rod cut to lengthen; These two draw wire encoder detect the pulse signal that obtains and voltage signal is input in CPU314C-2DP module and SM331 Analog input mModule respectively, realize the supervision of bracket locations and casting rod length by the programming of software in computer control unit.
Described calculation control unit comprises: the PLCCPU15 adopting the CPU314C-2DP module in Siemens S7300, adopts the PLC analog output module 16 of the SM332 analog output module in Siemens S7300 and the PC 14 of STEP7 programming software and hydrostatic testing device software is housed; The process of the pulse signal that calculation control unit is detected by signal, amplifier detection signal, amplifier feedback signal and pulse output type draw wire encoder 4 that potentiometer 18 is given, final control amplifier 13 output signal realizes the speeds control of automatic or manual cast.
Bracing wire steel wire rope is fixed to a certain position of caster bracket 3 by fixture, assembly pulley by described pulse output type draw wire encoder 4 and voltage output type draw wire encoder 5, this position is tested through many experiments, can ensure under same speed, move to same position accuracy and synchronism, anti-leak-stopping material is to the damage of steel wire rope simultaneously at every turn; In the motion process of caster bracket 3, pulse output type draw wire encoder 4 recording impulse number, pulse signal is input to computing in PLCCPU15, makes the precision of its detection speed reach 0.5mm/s; Voltage output type draw wire encoder 5 is for monitoring bracket 3 position and casting rod length, and voltage signal is input in PLC Analog input mModule 17; Above Monitoring Data is input in PC 14 by the communication module of PLCCPU15, achieves display in real time and the function recorded by programming software and configuration software.
For a speed regulating method for the arrangements for speed regulation of automation continuous casting system, it is characterized in that, comprise manual operation and automatically control two kinds of mode of operations, and device initialize operates and cast operates two operating procedures, when operated, 0-10V DC voltage is input in amplifier 13 by potentiometer 18, amplifier 13, potentiometer 18 drives electrohydraulic proportional velocity regulating valve 7 to carry out speed governing through computing, the stepless time adjustment in range ability is realized by the change of given voltage, the opening value of electrohydraulic proportional velocity regulating valve 7 turns back to again in amplifier 13 simultaneously, by the feedback output end of amplifier 13, the opening amount signal of 0-6V is input in PLC Analog input mModule 17, and the given 0-10V signal of potentiometer 18 also inputs in PLC Analog input mModule 17, converted by software in PLCCPU15 simultaneously, two values are compared, the change curve of opening value with given voltage can be observed, carry out mating between hydraulic system with potentiometer 18 set-point,
During automatic control, operator is inputting process parameters on PC 14 operation interface, when cast starts, signal is given electrohydraulic proportional velocity regulating valve 7 by another input port of amplifier 13 by PLC analog output module 16, electrohydraulic proportional velocity regulating valve 7 is opened and is carried out work, and Real-Time Monitoring value is sent in PLC Analog input mModule 17, carries out closed-loop control, realize the accurate control meeting production requirement.
Described device initialize is operating as the operation of dummy ingot centering, namely caster bracket 3 first moves to dummy ingot 2 apart from water tank 30mm by lowermost end with the speed of 9mm/s, controlled to decelerate to 3mm/s by PLC analog output module 16, continue again to rise, automatically 1mm/s is lowered to when dummy ingot 2 enters crystallizer hourly velocity, in this process, pulse output type draw wire encoder 4 and voltage output type draw wire encoder 5 output signal in PLCCPU15 and PLC Analog input mModule 17 respectively, by program, speed is adjusted, pulse output type draw wire encoder 4 is responsible for tachometric survey feedback, voltage output type draw wire encoder 5 is responsible for position signalling feedback.
Described cast is operating as under the instruction of operating personnel's input, speed according to setting carries out cast, signal is given electrohydraulic proportional velocity regulating valve 7 by amplifier 13 input port by PLC analog output module 16, electrohydraulic proportional velocity regulating valve 7 is opened and is carried out work, simultaneously pulse output type draw wire encoder 4 and voltage output type draw wire encoder 5 detection speed and displacement, and carry out closed-loop control in a program, on guidance panel, show these Real-Time Monitoring value and conditional curves simultaneously, the more all technological parameters in whole operating process are saved in excel book.
Beneficial effect of the present invention is:
1, compared with steel-wire rope traction mechanism, more steadily accurately can control the velocity and distance of movement of bracket, better realize the centering of dummy ingot, the production for semi-solid blank provides easier method, decreases the error of artificial dummy ingot centering.
2, compared with traditional automation, semi-automatic measurement mechanism, what pulse signal and voltage signal provided is not set-point, but real measured value, it is the actual value of movement of bracket, the speed measured is by controlling more accurately the position of bracket, to make technological parameter more accurately stable with the contrast of electric-hydraulic proportion magnetic valve aperture and potentiometer set-point.
3, by the contrast of above several groups of data, make whole system can be very accurate on casting speed control, and pass through configuration software, the position of pulling rate and movement of bracket can be reacted more intuitively with PC, simultaneously can the working condition recording whole casting process of system by the preservation of backstage historical data, eliminate much artificial error, improve the quality of semi-solid blank.
Accompanying drawing explanation
Fig. 1 is a kind of schematic diagram of the arrangements for speed regulation for automation continuous casting system; Wherein, 1-smelting furnace, 2-dummy ingot, 3-caster bracket, 4-pulse output type draw wire encoder, 5-voltage output type draw wire encoder, 6-hydraulic jack, 7-electrohydraulic proportional velocity regulating valve, 8-check valve, 9-hydraulic lock, 10-solenoid directional control valve, 11-overflow valve, 12-Pressure gauge, 13-amplifier, 14-PC machine, 15-PLCCPU, 16-PLC analog output module, 17-PLC Analog input mModule, 18-potentiometer.
Detailed description of the invention
Below in conjunction with drawings and Examples, method proposed by the invention is described further.
The object of the invention is the measurement to hydraulic system draw-casting machine casting speed, this device not only can measure the speed and distance that in casting process, bracket declines accurately, and can measure when bracket rises and the movement velocity of bracket and distance in dummy ingot centering process, feed back in PLC, reach the object of automatic dummy ingot centering.For achieving the above object, the present invention takes following technical scheme:
Example is prepared as so that the operation principle of apparatus of the present invention to be described below with semisolid A390 aluminum alloy blank.Be illustrated in figure 1 a kind of arrangements for speed regulation for automation continuous casting system, for the processing of aluminium alloy semi-solid state blank, this device comprises moving cell, detects feedback unit and calculation control unit; Wherein moving cell comprises: caster bracket 3, hydraulic jack 6, electrohydraulic proportional velocity regulating valve 7, check valve 8, hydraulic lock 9, solenoid directional control valve 10, overflow valve 11, amplifier 13, potentiometer 18; Detect feedback unit to comprise: pulse output type draw wire encoder 4, voltage output type draw wire encoder 5, Pressure gauge 12, PLC Analog input mModule 17; Calculation control unit comprises: PC 14, PLCCPU15, PLC analog output module 16.
Bracing wire steel wire rope is fixed to a certain position of caster bracket 3 by fixture, assembly pulley by pulse output type draw wire encoder 4 and voltage output type draw wire encoder 5, this position is tested through many experiments, can ensure under same speed, move to same position accuracy and synchronism, anti-leak-stopping material is to the damage of steel wire rope simultaneously at every turn; In the motion process of caster bracket 3, pulse output type draw wire encoder 4 recording impulse number, pulse signal is input to computing in PLCCPU15, makes the precision of its detection speed reach 0.5mm/s; Voltage output type draw wire encoder 5 is for monitoring bracket 3 position and casting rod length, and voltage signal is input in PLC Analog input mModule 17; Above Monitoring Data is input in PC 14 by the communication module of PLCCPU15, achieves display in real time and the function recorded by programming software and configuration software.
The hydraulic system of moving cell comprises hydraulic jack 6, electrohydraulic proportional velocity regulating valve 7, check valve 8, hydraulic lock 9, solenoid directional control valve 10, overflow valve 11, hydraulic cylinder 6 drives caster bracket 3 to move back and forth under the cooperation of solenoid directional control valve 10 and electrohydraulic proportional velocity regulating valve 7, when caster bracket 3 declines, right one-way valve is opened, left side electrohydraulic proportional velocity regulating valve carries out speed governing, on the left of when caster bracket 3 rises, check valve 8 is opened, right side electrohydraulic proportional velocity regulating valve carries out speed governing, forms meter out speed governing.
This device is divided into manual operation and automatically controls two kinds of mode of operations, when operated, 0-10V DC voltage is input in amplifier 13 by potentiometer 18, amplifier 13, potentiometer 18 drives electrohydraulic proportional velocity regulating valve 7 to carry out speed governing through computing, the stepless time adjustment in range ability is realized by the change of given voltage, the opening value of proportional velocity regulating valve 7 turns back to again in amplifier 13 simultaneously, by the feedback output end of operational amplifier 13, the opening amount signal of 0-6V is input in PLC Analog input mModule 17, and the given 0-10V signal of potentiometer 18 also inputs in PLC, converted by software in PLC simultaneously, two values are compared, the change curve of opening value with given voltage can be observed, this step has carried out mating between hydraulic system with potentiometer set-point.
The advantage of these arrangements for speed regulation is mainly given prominence in automatic control engineering, and when carrying out automatic continuous casting, the data obtained by pulse output type draw wire encoder 4 and voltage output type draw wire encoder 5, carry out must mating with given magnitude of voltage in PLC.Detailed process is: during automatic operation, operator is inputting process parameters on computation interface, when cast starts, signal is given electrohydraulic proportional velocity regulating valve 7 by another input port of amplifier by PLC analog output module 16, flow speed control valve opens and carries out work, and Real-Time Monitoring value is sent into PLC, so just closed-loop control, in PLC, program is perfect, realize the accurate control meeting production requirement.Especially, in the process of bracket rising dummy ingot centering, by continual collection inquiry, hydraulic system and speed adjustment unit coordinate, and can reach good effect.In whole production process, link is manually less, while saving manpower, production process can be made more accurate.
The speed regulating method of this device comprises: first carry out device initialize operation, this will carry out the operation of dummy ingot centering, caster bracket 3 first moves to dummy ingot 2 apart from water tank 30mm by lowermost end with the speed of 9mm/s, controlled to decelerate to 3mm/s by PLC, continue again to rise, automatically 1mm/s is lowered to when dummy ingot 2 enters crystallizer hourly velocity, in this process, pulse output type draw wire encoder 4 and voltage output type draw wire encoder 5 output signal are to PLC, by program, speed is adjusted, pulse output type draw wire encoder 4 is responsible for tachometric survey feedback, voltage output type draw wire encoder 5 is responsible for position signalling feedback.
After device initialize completes, carry out cast, under the instruction of operating personnel's input, speed according to setting carries out cast, signal is given electrohydraulic proportional velocity regulating valve 7 by amplifier 13 input port by PLC analog output module 16, flow speed control valve 7 is opened and is carried out work, simultaneously pulse output type draw wire encoder 4 and voltage output type draw wire encoder 5 detection speed and displacement, carry out closed-loop control in a program, on guidance panel, show these Real-Time Monitoring value and conditional curves simultaneously, again all technological parameters in whole operating process are saved in excel book.
The above; be only the present invention's preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (7)
1. for arrangements for speed regulation for automation continuous casting system, it is characterized in that, comprise moving cell, detect feedback unit and calculation control unit; Wherein moving cell comprises: caster bracket (3), hydraulic system; Detect feedback unit to comprise: pulse output type draw wire encoder (4), voltage output type draw wire encoder (5), amplifier (13), PLC Analog input mModule (17), potentiometer (18); Calculation control unit comprises: PC (14), PLCCPU (15), PLC analog output module (16);
The hydraulic system of described moving cell comprises hydraulic jack (6), electrohydraulic proportional velocity regulating valve (7), check valve (8), hydraulic lock (9), solenoid directional control valve (10), overflow valve (11), Pressure gauge (12), liquid level liquid thermometer; Three-position four-way electromagnetic directional valve 3WE6A-61B/CG24NZ5L selected by solenoid directional control valve (10), electrohydraulic proportional velocity regulating valve (7) adopts 2FRE6B-20B/16QM, check valve (8) adopts S10A1/2, Pressure gauge (12) adopts YN60,0-40MPa, liquid level liquid thermometer adopts YWZ200T; Caster bracket is realized at the speeds control risen and in decline process by the hydraulic system of the meter out speed governing of design, electrohydraulic proportional velocity regulating valve (7) adopts 2FRE6B-20B/16QM to make to rise to the movement velocity that can control caster bracket in the process of certain position dummy ingot centering at caster bracket simultaneously, and minimum speed can reach 0.8mm/s.
2. device according to claim 1, is characterized in that, described amplifier (13) adopts VT-5010S30 feedback circuit; PLCCPU (15) and PLC Analog input mModule (17) adopt CPU314C-2DP module in Siemens S7300 and SM331 Analog input mModule respectively; Pulse output type draw wire encoder (4) adopts KS90 pulse output type draw wire encoder, and be used for detecting caster bracket movement velocity, the number according to exporting pulse obtains velocity amplitude and move distance value by conversion; Voltage output type draw wire encoder (5) is used for detecting caster bracket position, is dummy ingot centering and the service of casting rod cut to lengthen; These two draw wire encoder detect the pulse signal that obtains and voltage signal is input in CPU314C-2DP module and SM331 Analog input mModule respectively, realize the supervision of caster bracket position and casting rod length by the programming of software in calculation control unit.
3. device according to claim 1, it is characterized in that, described calculation control unit comprises: the PLCCPU (15) adopting the CPU314C-2DP module in Siemens S7300, adopts the PLC analog output module (16) of the SM332 analog output module in Siemens S7300 and the PC (14) of STEP7 programming software and hydrostatic testing device software is housed; The process of the pulse signal that calculation control unit is detected by signal, amplifier detection signal, amplifier feedback signal and pulse output type draw wire encoder (4) that potentiometer (18) is given, final control amplifier (13) output signal realizes the speeds control of automatic or manual cast.
4. device according to claim 1, it is characterized in that, bracing wire steel wire rope is fixed to caster bracket (3) a certain position by fixture, assembly pulley by described pulse output type draw wire encoder (4) and voltage output type draw wire encoder (5), this position is tested through many experiments, can ensure under same speed, move to same position accuracy and synchronism, anti-leak-stopping material is to the damage of steel wire rope simultaneously at every turn; In the motion process of caster bracket (3), pulse output type draw wire encoder (4) recording impulse number, pulse signal is input to computing in PLCCPU (15), and the precision of the detection speed that caster bracket is moved reaches 0.5mm/s; Voltage output type draw wire encoder (5) is for monitoring caster bracket (3) position and casting rod length, and voltage signal is input in PLC Analog input mModule (17); Above Monitoring Data is input in PC (14) by the communication module of PLCCPU (15), achieves display in real time and the function recorded by programming software and configuration software.
5. adopt a speed regulating method for the arrangements for speed regulation for automation continuous casting system according to claim 1, it is characterized in that, comprise manual operation and automatically control two kinds of mode of operations, and device initialize operates and cast operates two operating procedures, when operated, 0-10V DC voltage is input in amplifier (13) by potentiometer (18), amplifier (13), potentiometer (18) drives electrohydraulic proportional velocity regulating valve (7) to carry out speed governing through computing, the stepless time adjustment in range ability is realized by the change of given voltage, the opening value of electrohydraulic proportional velocity regulating valve (7) turns back to again in amplifier (13) simultaneously, by the feedback output end of amplifier (13), the opening amount signal of 0-6V is input in PLC Analog input mModule (17), and the given 0-10V signal of potentiometer (18) also inputs in PLC Analog input mModule (17), converted by software in PLCCPU (15) simultaneously, two values are compared, the change curve of opening value with given voltage can be observed, carry out mating between hydraulic system with potentiometer (18) set-point,
During automatic control, operator is inputting process parameters on PC (14) operation interface, when cast starts, signal is given electrohydraulic proportional velocity regulating valve (7) by amplifier (13) another input port by PLC analog output module (16), electrohydraulic proportional velocity regulating valve (7) is opened and is carried out work, and Real-Time Monitoring value is sent in PLC Analog input mModule (17), carry out closed-loop control, realize the accurate control meeting production requirement.
6. method according to claim 5, it is characterized in that, described device initialize is operating as the operation of dummy ingot centering, namely caster bracket (3) first moves to dummy ingot (2) apart from water tank 30mm by lowermost end with the speed of 9mm/s, controlled to decelerate to 3mm/s by PLC analog output module (16), continue again to rise, automatically 1mm/s is lowered to when dummy ingot (2) enters crystallizer hourly velocity, in this process, pulse output type draw wire encoder (4) and voltage output type draw wire encoder (5) output signal in PLCCPU (15) and PLC Analog input mModule (17) respectively, by program, speed is adjusted, pulse output type draw wire encoder (4) is responsible for tachometric survey feedback, voltage output type draw wire encoder (5) is responsible for position signalling feedback.
7. method according to claim 5, it is characterized in that, described cast is operating as under the instruction of operating personnel's input, speed according to setting carries out cast, signal is given electrohydraulic proportional velocity regulating valve (7) by amplifier (13) input port by PLC analog output module (16), electrohydraulic proportional velocity regulating valve (7) is opened and is carried out work, simultaneously pulse output type draw wire encoder (4) and voltage output type draw wire encoder (5) detection speed and displacement, and carry out closed-loop control in a program, on guidance panel, show these Real-Time Monitoring value and conditional curves simultaneously, again all technological parameters in whole operating process are saved in excel book.
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| CN105019907A (en) * | 2015-07-28 | 2015-11-04 | 泉州华大超硬工具科技有限公司 | Electrical control system for modular digital hydraulic wire saw |
| CN108188385A (en) * | 2018-01-19 | 2018-06-22 | 青岛贝诺磁电科技有限公司 | A kind of casting smelting real time data synchronization manages system |
| CN111266545A (en) * | 2020-02-25 | 2020-06-12 | 唐山钢铁集团有限责任公司 | Method for replacing manual regulation of casting speed of continuous casting machine by HMI input setting |
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| JPH04123853A (en) * | 1990-09-10 | 1992-04-23 | Nkk Corp | Apparatus for adjusting casting speed in continuous casting |
| JP3367308B2 (en) * | 1995-12-01 | 2003-01-14 | 株式会社明電舎 | Control device of slab receiving trolley in vertical continuous casting equipment |
| JP5181810B2 (en) * | 2008-04-30 | 2013-04-10 | 新日鐵住金株式会社 | Speed control device for pinch roll in continuous casting machine. |
| CN201493460U (en) * | 2009-09-21 | 2010-06-02 | 安徽工程科技学院 | Speed controller for copper product continuous casting tractor |
| CN102233416B (en) * | 2010-04-28 | 2013-04-24 | 宝山钢铁股份有限公司 | Lightly-pressed roll speed control method |
| CN203003105U (en) * | 2013-01-07 | 2013-06-19 | 武钢集团昆明钢铁股份有限公司 | High-noise-immunity throwing rate control device for small billet caster |
| CN203003106U (en) * | 2013-01-11 | 2013-06-19 | 安徽工程大学 | Programmable logic controller (PLC) speed regulation controller of continuous casting tractor |
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